Facile preparation and characterization of poly(vinyl alcohol)-NaCl-glycerol supramolecular hydrogel electrolyte
Facile preparation and characterization of poly(vinyl alcohol)-NaCl-glycerol supramolecular hydrogel electrolyte
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DOI：
10.1016/j.eurpolymj.2018.07.024
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发表时间：
2018-09-01
影响因子：
6
通讯作者：
Hou, Linxi
中科院分区：
文献类型：
--
作者：
Peng, Shuijiao;Liu, Shuxuan;Hou, Linxi
制备具有高强度、高愈合能力和热塑性的水凝胶电解质是一个重要的课题，也是一个巨大的挑战。提出了一种制备聚乙烯醇（PVA）超分子水凝胶电解质的新方法。利用氢键和盐析作用制备了PVA水凝胶电解质。将甘油和NaCl掺杂到聚乙烯醇水溶液中，室温放置2.0h，可制得高性能的PVA-NaCl-甘油水凝胶电解质。采用傅立叶变换红外光谱、X射线衍射和拉伸试验对PVA-NaCl-甘油水凝胶电解质的结晶度、热性能和力学性能进行了表征。探讨了水凝胶的形成机理。PVA-NaCl-甘油水凝胶具有较高的韧性，拉伸强度和断裂伸长率分别为0.57（+/- 0.02）MPa和575（+/- 29）%。PVA-NaCl-甘油的电导率高达92.5（+/-0.18）mS/cm。PVA-NaCl-甘油水凝胶电解质具有良好的热愈合能力和热塑性。PVA-NaCl-甘油体系的这些性质与甘油和NaCl的作用有关。本文为高性能水凝胶电解质提供了一种新的制备方法和结构设计思路。
The facile preparation of hydrogel electrolyte with high strength, healing ability and thermoplasticity is important and still remains a great challenge. In this paper, a novel way for the preparation of poly(vinyl alcohol) (PVA) supramolecular hydrogel electrolyte was presented. The PVA hydrogel electrolyte was prepared via the hydrogen bonding and salting-out effect. The high performance PVA-NaCl-glycerol hydrogel electrolyte could be obtained by the doping of glycerol and NaCl into PVA aqueous solution and storing at room temperature for 2.0 h. The crystallinity, thermal and mechanical properties of PVA-NaCl-glycerol hydrogel electrolyte were characterized by Fourier transformed infrared spectroscopy, X-ray diffraction measurement and tensile testing, respectively. The hydrogel forming mechanism was discussed. The PVA-NaCl-glycerol hydrogels performed the high toughness with the tensile strength and elongation at break of 0.57 ( +/- 0.02) MPa and 575 ( +/- 29)%, respectively. The conductivity of PVA-NaCl-glycerol was as high as 92.5 ( +/- 0.18) mS/cm. The PVA-NaCl-glycerol hydrogel electrolyte behaved the excellent heat healing ability and thermoplasticity. These properties of PVA-NaCl-glycerol are related to the role of glycerol and NaCl. This paper provides a new preparation method and structure design idea for the high performance hydrogel electrolyte.